Friction-coupling



(No Model.)

0.` KROMER. y Nofsgllzz FRITION Gwnted June 26, 188,8l

E V A Fig/0 ATENT OFFICE.

OTTO KROMER, OF SANDUSKY, OHIO.

FRlCTlON-COUPLING.

SPECIFICATION forming part of Letters Patent No. 385,122, dated June 261 1888,

(No model.)

To all whom it may concern:

Be it known that I, OTTO KROMER, a citizen of the United States, residing at Sandusky, in the county of Erie and State of Ohio, have invented certain new and useful Improvements in FrictiouCouplings, of which the following isa specification, reference being had therein to the accompanying drawings.

This invention relates to new and useful improvements in frictioircouplings, designed for securing all kinds of mechanical devices upon shafts or for use as a shaft-colliding; and the invention is intended to forman improvement upon a similar coupling for which I have received Letters Patent, dated June 22, 1886, and numbered 344,320.

The invention consists in the simplified construction whereby I am enabled to manufacture the device by casting without any eX- pense in fitting it, which was required in the former device, and whereby I am enabled now to manufacture the device more cheaply.

In the drawings which accompany this specification, Figures I and 2 are vertical central longitudinal sections, the former showing my device as preferably applied to `secure various kinds of mechanical devices upon ashaft, and the latter as applied for a shaftcoupling. Fig. 3V is an end elevation of Fig. 1. Fig. 4 is a erosssection' of Fig. 2 on line mm. Fig. 5 is a crosssection of Fig. 2 on line yy. Fig. 6 is an end elevation of Fig. 2. Figs. 7 and S are vertical central sections showing modifications of my improved coupling. Fig. 9 is an end elevation of Fig. S. Fig. l0 is a crossssection on line 'w 10, Fig. 7.

A is a collaror sleeve, which may represent the hub of a pulley or other piece of machinery or the sleeve of a shaft-coupling, according to thc use to which my improvement is applied, and this collar or sleeve is provided with the usual cylindrical bore to fit the shaft or shafts C. Upon one or both ends of this collar or sleeve I provide an endwise-projecting abutment, D, which may be incorporated with a circular flange, E, upon the end of the sleeve or collar, as shown in Figs. 1, 2, and 3, or which may ferm an isolated stud, as shown in Figs. S and 9.

F is a ring-wedge, either provided with the flange G or without, and with the sockets 7L or their equivalents, for the use of a spanner'or wrench, as will more fully hereinafter appear. The inner face of the ring is cylindrical and fits the shaft, and the outer face is also cylindrical, but is eccentric-to the inner face, the former having its center ata and the latter having its center at b.

rIhe parts being constructed and arranged as shown and described, they are intended to op erate as follows: After the ring-wedgeisslipped upon its shaft so that its thinnest portion is brought under the abutmentD,the Spanner or wrench is then applied to it, by means of.

which it can be turned with greatA force upon its axis until it is rmly wedged between the shaft andthe abutment. Asimilar ring-wedge may be applied to the other end of the hub or sleeve, and if turned in the opposite direction to the one upon the opposite end the collar or sleeve can be so firmly locked in position upon the shaft that as a means of fastening it will favorably compare with the present means, while at the same timeno injury can happen to the shaft, as frequently is the case with the use of set screws or keys, and, further, the co1- lar or sleeve can be readily removed again, if desired.

In applying my device to the hubs of pnl leys or any other kind of wheel where great strain is brought on the fastening I deem it advisable to strengthen the abutment by increase of metal on the hub and by the use of the circular flange E, which forms a recess which conceals and protects the ring-wedge, as shown in Figs. 1 and 3.

The flange G on the ring-wedge is merely intended to give more body to the ringwedge, so that the sockets may be placed nearer the outer edge without weakening the ring.

It is obvious that my ring-wedge need not be a complete ring, as only a portion of the ring is required to form the locking device. I however prefer to use the complete ring. The advantage which I get with my construction is that no fitting at all is required, andthe whole device maybe made in operative shape by casting.

In the application of my device as a shaftn coupling (shown in Fig. 2) I put a loose key, J, into a suitable keyway formedl in the ends ofthe shafts to be coupled, and a correspond- IOO ing keyway I provide in the sleeve. Vhile this is not necessary it greatly tends to strengthen the coupling. In Fig. 7 I show a ring-Wedge constructed and applied upon the outer face of the abutment on the collar or sleeve. It will be readily seen that this is merely the converse way of my former construction, and forms a part of my invention, and the cylindrical face (marked c in this modication) ofthe ring-Wedge forms the equivalent of the outer cylindrical face ot' the ringwedge, as shown in the other constructions.

What I claim as my invention is* l. In a friction-coupling, the combination, with a collar or sleeve provided with abore for the reception of a shaft, and an abutment on the end of said collar or sleeve, of a ring- Wedge having a bore to lit the shaft, and an outer cylindrical face, or its described equivalent, eccentric therewith and adapted to operate in connection with the shaft and abutment on the collar or sleeve, substantially as and for the purpose described.

2. Inashaft-coupling, thecombinatio1i,with a collar or sleeve provided with a central bore,

and an annular flange formed upon the end of said collar or sleeve, and an abutment formed integral with said flange, of a ring-Wedge having a corresponding bore With the sleeve and an outer face eccentric therewith, said ring- Wedge being adapted to act in connection with the abutment and shaft, substantially as and for the purpose described.

3. In a friction-coupling, the combination, With a sleeve provided with a central bore, a keyway formed in said bore, an annular recess formed on the end of said sleeve eccentric thereto, and an abutment formed on the inner face of said recess, of a ringwedge having a corresponding bore With the sleeve and adapted to fit into the recess, substantially as and for the purpose described.

In testimony whereof I aftix my signature, in presence of two witnesses, this 5th day of December, 1887.

OTTO KROMER.

Vitnesses:

PHILIP HERDER, J. ERCKENER. 

